Valve or cover for tanks.



'R. H: MOORE. VAL TE OR COVER FOR TANKS. APPLICATION T111111) 001. 25;1911.

1,040,7 30. Paten ted 001, s, 1912.

V Slum/$ 1,

Foerfi/V. Moore. I

wwwwow 1 NITED T TE ROBERT H. Moons, OFCHICAGO, riitintols, is 0COMPANY, oncnxcAoo, nirimo'rs, 4 so VALVE on seven es-mag To all whom itmay concern:

Be it known that--I, Ronsn'r' H. Moons, of Chicago, in the county ofCook and State of Illinois, ha ve 'inventedtwrtain new and use-- villactautomatically under the conditions stated.

forth and particularly pointed out in the claims.

In the accompanying t-ional view;

Referring to the drawings, 1 designates a manhole ring or angle-iron ofknown con struct-ion, which in practice is secured to the top of an oiltank, such as is used in wood To a bracket 2 riveted tothispreservation. angle-iron a ring 3, forming part-of the top or cover, islunged at 4. This ring 3 is designed to seat upon the upper edge. ofangle-' iron 1, and its opening is closed by a disk 0 slightly largerthan the diameterof said opening. This disk is-designed to extend inpart beneath and in part above-ring 3 to. which .it forms thecomplementary ortionof the cover. For this purpose the iskj 5 isslightly deflected, as at (i. at a point to one side of the center ofthe disk, the upper segment of the latter being above ring 3, while thelower segu'ient is beneath the latter, the plane of the ring beingintersected by-the defiection 6. The inner edge of the ring 3 isslightly cut away. as at 7; to allow the deflected portion of the diskto extend throughthe ring, to which latter the disk is hingedat 8, theaxis of the hinges being on a line with the deflection. To the upperouter seg-- ment of the disk I attach counter-weight 9 which serves tonormally hold the disk in.

closed position. that is to say. with the larger segmentfitted upwardlyagainst its seat, and the smaller segment downwardly on its seat.

. Specification 6r remitt ng, I i Application filed October 25, 191 S Fa-I F 56ir 9.-

the provision The invention will be hereinafter fu'llyyset.

draWingSQFigure 1 1s a plan VIEW. Fig. 2 1s a transverse secone oneINDIANA;

as a whole by turning onhinge 4. Pics sure on theoutside,in consequenceof a, partial vacuum within the tank, will'be relieved by the turningofidiskf, on-its hinge, the external pressurelon the downwardly openmgsegment overcoming the weight'of the in themselvesajqosu're for: thetank.

thou h ch structlon' fan simple'an'd highlyiefiic ent valye for manholecovers which will iactautomaticiilly to. rehcve any-excess of pressnrewithin or with I.cla ini fis.my'inyentioni% 1. Amanhole of war fortankscomprisin a ring, hinged aEOneside to the" tank, an a.

ring and disk"beingyconstriicted, and arra ng'ed I to eonj ointly:opeributwardl under an excess of-pressure from within't e tank,

in tlhe event"of"a'ipartialfvacuum within the 2, Amahhole "coverforftanks comprising a rmgdeslgn'ed to be' hinged at one side, a

disk titting againstithe under side of said ring, the reni'atmng'portion"of said disk fitting against the upper-sidethereofisaid ring and diskbeing moved as a whole under an excess of pressure within theta-11k, andsaid disk beingamo'ved independently of. the ring it: :tl-he ev'cnt of ajpartial vacnum within the 3, i 3. A manholecover for tanks com risinga.disk coinprisingtwoara-llell segments connected by-a de'tlecte portlon,one of'said other above the ring, the defictedport-ion. of

said .disk being h aged to said ring in line with the deflected portionof the ,disk.

4. A manhole cover for tanks comprising aring designed to-b' hin 'ed atone side, a disk com 'u isi'ng two'paralel segments 00?. .nected by adeflected portion, one of said segments being beneath said ring and theother smaller segment. 5 The two parts constitute sages inay ibe made inthe; con.- I rt m n OfTP T i manifestitha't fIfhave' ovided an.extremely disk closing the" opening'vin said ring, said ,Saiddisk beingpivoted 'on said ring andconstructedflnd arrahgd'to' open inwardlysegments being beneath saitfring and the the disk intersecting theplanes-oi the riiig,

above the ring. said deflected portion being- It willbe'sgeen underan;excess of pressure within the tank, acting'against the underside=of thecover, the latterwill open out theQtanktendin'g toinjnrethe casing,-

disk pivoted to s aid ring, a portion of said ring designed to behinged, at one, si e, and :1

:itbne s ide ef the center -of the disk andde In testimony whereof, I:haa re signed this I signed to intersect the plane of the ring,Specification.1n -the presence of two sub- 10 meefis pIiveteHyeennlegsigg tlga disk to the" scnbing witnesses ring in;- ine-With Sai eeete portion-the 5 larger segment of the disk being beneath the ROBERTM00311 rin and the smaller segment above the ring, Witnesses: an -a.qounterweight attached to said smaller J. H. DURHAM, segment- G. G.Buns.

